Jagqtjaed-machine



` 3 sheenssheen 1. J. sGoTT a; J. TANNAHBLL.

No.7,990. Patented Mar. 18., 1851.

` J.sooTT &

3 Sh.eets-Sheet J.TANNAHBLL; LooM.` i

Patented Mar. 18, 1851.

LOOM.

Patented Mar. 18, 1851.

f UNITED STATES rATENTorrion. i

JOHN SCOTT AND JOHN TANNAHILL, OF PHILADELPHIA, PENNSYLVANIA.

JAcQUARD-MACHINE.

Specification `ozt Letters Patent No. `7,990, dated March 18, 1851.

quard machine, the treadles being connect-` ed with it, but the otherparts ofthe loom being omitted as unnecessary forthe explanation of theinvention. Fig. 2 is a :tront elevation oi''r the same. `Fig. 3 is atrans-` `verse vertical section` of "thejsame through the center. Fig. 4is a detached view in perresponding' spective of one ofthe double`lockers for giving motionto thecylinder frame.

*Similar letters of reference indicate"corparts in` each of the severalfigures.` f j" y l The nature of our invention consists firstly, in animprovement in the `manner of operating thecylinder "for the purpose ofturningit and changing the pattern card more qulckly and, secondly, inapplying tubular leaden weights to the tail cords above the harness ofthe` loom for the purpose of keeping tensien onthem and insuring theirproper operation as the trap boards are raised or lowered.` 1.

Te enebie cenere ekiiieei in the eef te mere and use our invention, wewill proceed to describe fully its construction and operation.

yA, A, representpartof the frame of the loom; B, B, the rameof theJacquard inachinev-which has twotrap boards(C),(O) attached to plates(D), (D), capable o sliding up or down in suitable guides; these trapboards are each lsuspended by straps (E) (E), which are secured to theperipheries of rollers (F), (F), mounted on a rocking shaft G, which hasbearings in the upper part of the frame, the boards being thus attachedone must be always ascending while the other is descending.

`H, H, (nearthe top of the frame) are the suspending boards from whichhang the knotted tail cords (a), (a), (a), (a).

I, I, are the .neck or directing boards through which the tail cordspass, below the trap boards.

J, J are the treaddles for raising and lowering the harness so as to`govern the shedding of the warp; J, is connected tothe` frontA trapboard O; `and J', tothe back trap board C; the connection being formedby rods (b), (b), leading lfrom the plates D, D, to cross pieces (c),and (0'), which are connected `with the treadle by short rods (d), and(cZ). i i

(l, d, are the needles which are arranged and supported in theusualmanner, having eyes (e), (e), (e), through which the tail cordspass and `by which when moved by the cylinder `the action of the harnessi's governed; the tail cords have small tubular ieeden weights (l), (z),(l), et`

tached to the below the neck board for the purpose of keeping them tightso that their knots cannot be missed or wrongly caught by the trapboards. These weights will 1 supercede` the necessity of having theweights below the harness as heavy as usual and will bemoreieii'ectivein preserving` the correct operation of it.

\ K, is `the cylinder which is constructed in the usual manner, and hungin a frame con- `sisting of two parallel rods (L), (L), `which slidebearing boxes (f), (f), attached to the sides of the frames, and areheld togetherin front by a transverse rod M, and

at the back bythe bar N; lc, is `the catch which turns the cylinder.

O, O, (one on `each side of the machine) are what we term the dowellockers consisting` of plates ofmetal having bosses fitting on the`sliding. bars L, L, towhich `they are secured by set screws (g), (9,)they have grooves (z',), nearly in the form of the letter D, thestraight side being slightly elongated at the bottom, a step or fallbeing made in the groove as thetop and bottom in the corners (see h,7L', Fig. 4,); a spiral spring (P,) (See Fig.` 1) is coiled around Yother treadle and its board to be similarly operated, making one shed ateach operation; in that case the cylinder is moved forward during theupward motion of the back board O, by which it is turned for takinganother pattern card, and it is brought back to its place by thedownward' stroke of the board; the groove in the locker for that purposebeing nearly in the form of the letter s.

Our machine is operated by the weaver placing his right foot on thetreadle J and his left foot on the treadle J, and keeping up acontinuous treading motion with both feet, at the same time, causing onetreadle to ascend as the other descends, and raising one board as hedepresses the other, making a rising and falling shed, one part of theshed rising as the other part is falling, which allows two sheds to beformed, in the same time as one when the boards are detached; thisrequires the cylinder to be thrown forward, turned, and brought back toits place, by one motion of the backboard, as, if it were broughtforward and turned by the upward motion, and returned to its place bythe downward motion, the cards could not be properly presented to theneedles.

The operation of the double locker will be seen by referring to Figs. 3and 4. The back board C, is represented in all the Figs.; in its lowestposition and the friction rollers n, a, in the lowest part of the groovez', i; as the board O is raised by depressing the treadle J, and frontboard C', the roller passes up to the curved part of the groove,overcoming the resistance of the spring P; and throwing forward thecylinder frame until itl (the roller) arrives at the most prominentpoint r, of the curve, at which time the frame has carried the cylinderto its most forward position and it (the cylinder) has been turned bythe catch L, in the usual manner, so as to present its next side andanother card to the needles; as the roller a, continues ascending thegroove z', t',

the spring P, carries back the frame, and

of the upper step h, in the groove, is forced below it and preventedfrom returning down the curved part; during the downward motion of theboa-rd O, and the raising the front part of the shed, the roller worksin the straight part of the groove, and the cylinder and pattern areheld stationary, the roller having arrived at the bottom falls over thelower step Zt, and is prevented returning in the same direction; the twosteps L, Zi, always preserving the proper direction of motion of thecylinder frame. By making the rising and falling shed, the weft isfilled into a crossed shed and a closer and firmer texture is given tothe cloth. The loom can also be worked at a high speed, the weights Z,Z, Z, Z, on the tail cords keeping them tight and preventing them frombeing displaced, at whatever speed the loom works.

l/Ve have proved by experiment that a hand loom with our improvements inthe Jacquard machine will Vweave as much Vingrain carpet as any powerloom, and works lighter than any loom now in use. y y

What we claim as new in our invention and desire to secure by LettersPatent is l. The manner of operating the cylinder by means of the doublelockers O, O, in combination with the springs P, P, whereby its`complete operation is effected by the upward motion of the trap boardO, substan' tially as, and for the purpose herein described.

2. The application of weights Z, Z, Z,Z, to the tail cords above theharness for the pur# pose of more efectually keeping them tight orstraight and thereby ensuring the more correct operation of the trapboards and needles upon them substantially in the manner herein setforth.

JOHN SCOTT. JOHN TANNAHLL.

Witnesses v JOHN BINNs, J AMES MARTIN.

